In view of the military manufacturing production site, the grounding grid not only by the electrochemical corrosion of soil environment, but also caused by discharge current electric corrosion, which caused serious damage to the equipment and personal safety. In order to overcome the above problems, this paper presented an intelligent control design scheme for electrochemical protection and corrosion monitoring of grounding grid in military manufacturing industry based on PLC, the design adopted the impressed current cathodic protection, hardware used the Siemens S7-300 experiment platform and software used Step7, which realized the free of the excavation of grounding systems located in soil corrosion protection and control, at the same time, the system integrated data processing, collection, analysis and feedback command. The results show that the design satisfied the remote control and monitoring of the grounding grid in the discrete manufacturing industry and ensured the safety, economic and stable operation of the military production equipment.